Torch



Nav. 29, 1938.

TORCH Filed Sept. 15, 1933 INVENTOR oro 144 y0u/v6 ATTORNEY w N A u Y w@www B Afl Patented Nov. 29, 1938 meSnB ents, to Union Carbide and Car-`bon Corporation, a corporation of New York Application' september 15,iosaserial No. ess-,'52s

" s claims. (ci. 15s-27.4)

This invention relates to torches especially adapted for-so1dering,"w'elding, paint burning, and similar operations utilizingtheheat Acfa gas iiame, andrhas particular reference to the class 5 of suchtorches which employ a mixture of air and fuel gas such as acetylene toproduce the heating flame. f

tween the axially-aligned drllledp e'ffthe i -injector nozzle and ftheniixer"tl1`roa :axially-.aligned passages arefusually' l5 .andof,.,dierent diameters; `hnce"ri`iderable skill and precisionarerequired inmanufcturing suchsmixers if these passages are to'cooperateeiliciently.` Forthis reason satisfactory construction ofthese partshas, heretofore, been' attained 20 with great difliculty. `Also, thepositioning-"and arrangement of these parts inthe torch as heretoforeyassembled has notfaiIordedfacile Vinterchange thereof in vadapting theAtorh'hto variations in workV4 conditions requiringf'changes" in 25 heatapplication or to easy removal of theparts for cleaning "or replacement.In the useof sch apparatus it is highly desirable that the mixingapparatus beaccessibly located when in" use while, at the same time,beingprotected against inadvertent closing of the air induction ducts bythe operator in manipulating the torch thereby producing a carbonizingflame. With certain of such apparatus, as soldering irons, it isimportant that theheat of the burning gas be conserved and 35 absorbedby the tip of the iron as much as possible and that combustion of thegas be as 'complete as possible in order to derive the full heat valuethereof and in order to prevent clogging of the apparatus and otherobjectionable results of car- 40 bonization. Since such torches arefrequently subjected to rough usage it is desirable that the assemblageof parts should be rugged and durable and also that there should be abalance in 'construction such that the torch will be easy to supportin'manipulation thereof.

It is, therefore, an object ot the invention to provide an improvedtorch of the above character, in which the constructions of the injectorand throat members are such as to promote 50 facility and precision intheir manufacture; in

which, assembly of the lmixer elements in the mixer, assembly of themixer with other elements of the torch and interchange of mixer elementsin adapting the torch to Variations in work con- 55 ditions arefacilitated; in which induction of a 'Lprovided for. l

Heretofore, the air-acetylene!mixer'flnsome types of such torches hasbeenprovided'witnair torch ,construction including a tubular mixermetducts extending througnthef-1wa11 of the mixer and communicatingwitha'chamber be- `f uniform supply o'f air into the mixer, balance andruggedness inv torch construction, and uniformity in flame conditions isinsured; and in which accessibility ofthe mixing parts while theapparatus 1 is in use, 'complete combustion of the fuel gases, 5

and conservation `of -the'heat produced thereby is Accordingly,"theinvention may comprise a member in the bore of `which is secured. m in-"jectoanda throat'membereach removable from bpposite endsjf the member..The mixer member i jgprefeablylocatedin' theftorch assembly at the'forward fend of .the handlefs'o as to be suilicientlyA frenioved `fromthe, torch flameto be very, little inuenced thereby .and may constitutea connection between the handle and'tip supporting. stem. The airinduction parts may be, suitably shielded as by a hoodagainst beingaccidentally closed and heat may A,be conserved at 1the `tip byconiining the 20 L flamel of the, torchwithina sleeve surrounding if thetip and vented 4to insure complete combustion of the ilamefsupportingfuel gas. v

Other objects andV novel features of the invention will become apparent.from the following 25 specifications talen with the accompanyingdrawing, in which:

Fig. 1 is a view in longitudinal section ofl a torch constructed inaccordance with this invention and showing a soldering attachmentconnected thereto;

Figs. 2, 3 and 4 are sectional views on lines 2 2, 3 3 and 4-4 of Fig.l;

. Fig. 5 is a view showing a gooseneck stem and tip combined replacingthe soldering iron, the handle of the torch being omitted; and

` Fig. 6 is a fragmentary view on an enlarged scale compared with Fig. lin longitudinal section through the rear end of the mixershowing theinjector nozzle and filter screen in place and the relation of theinjector nozzle to the throat member and to the air vents in theinjector body.

In order to avoid the expense of providing a separate torch for each ofthe multiplicity of jobs met with in small shops ,the apparatus of thisinvention provides for the `interchangeability of heating parts with thesame handle and for the interchangeability of mixer members to adapt theapparatus to such changes of heating parts. In the figures of theAdrawing are illustrated two of such interchangeable parts together withfacilities 'adapting the apparatus for 'corresponding interchangeabilityof mixerelements. The torch illustrated in Fig. 1 :comprises in itsprincipal parts, a handle H, a tubular stem S between be located,foi-iconvenienceoflnterchanging the sameandthelheating elements of theltorch for Y others of different natureand dimensions, at the front endyof the handle H and may conveniently constitute a connection betweenthe handle and the stem S. Location of the mixer between the* stem S andhandle H in this Amanner.positions. z the same out of range -of the,intense heat-ot.`

the torch so that no coolingfthereofis necessary before removing itfo1jrepair rep lacement or interchange of heating parts. -Also thislocation of the mixer makes it possible to ,-make'these changesy:without disconnectingthe handle from. he source of slipply of fuelgas' and without l loss of time incident .thereto.'

part I 2 A being in the nature lo f .an injector nozzle and' thepart I3in' the -nature of ae'throat member and are preferabiy' threadeqintg,theI passage of Y bodyJfThese membe passages |74 anais' ladiametersuitabito its purpose intheprg'nizaor throat of thethroatimember I3 whichfis concaveiy rounded, er tapered atpr'lrm te.'facilitate this laction. The formationfof Asucluija cocavedconstruction and drilli'igof the' passages through the injector noz'aleI2 and'throat member VI 3,`with nthe 'desie'd" prcisionis accomplishedwith dilculty'in constructions of thisfkind heretofore known anais'greatly rfaciiitauail in the present arrangement by the factthatthenozzlearid 4throat member are separately removable from the mixer bodyM. I e

Air inlets II are `provided in the wallsof the mixer body for admissionof air 1 to the Ybore thereof; these inlets being positioned todischarge in the bore between the injector and throat members. There area plurality of these inlets radially arranged with respect to the boreand protected against inadvertently being closed in the -handling of theapparatus' by means of a skirtor hood 22 secured in the end of thehandle H so as to surround the mixer body and Vso as to be spacedtherefrom at its forward end and to overlie the-air inlets I 1. The areaof the gap between the' skirt and injector body should be `greater thanthe combined areas of the passages so that it can b'e partly closedwithout affecting 'the amount of air supplied to `the mixer. ThisVskirt; 22 may conveniently constitute the forward ltif-the solderingiron `has a.

and throat members may be protected from being clogged by foreignsubstances in the fuel gas by suitable filtering means, as a screen 26preferably of finer mesh than the bores of the passages; the screenbeing held against the rear end of the injector member I4 by suitablemeans, as a resilient split ring 2`I which is pressed into the end ofthecounterbore I of the mixer body. Thev rearend of the' mixer bodyisthreaded into a. counterbore 29 formed inthe tubular block 23 andcoaxial with the bore therethrough.

The handle H may be secured on the pipe 25 v.against movement relativethereto by provision of a nut 30 threaded at 3l toi the pipe 25 atthai-earend of the handle by which the block 231may belfdrawn tightlyinto the socket 24 and the 'skirt'22 'at its forward end may be in thenature of a flange Vwhich rests against the forward end of the handlewhen the block is drawn tightly into the socket. The handle ispreferablylof durable construction such as will not crack, split, warpor couductheatto the hand, andfto this end it may be madeof a largenumkr voffturns of fibrous material impregnated with ycement,A v 1Thetipat which the-gaseous mixture supplied to the torch is consumed maybe of` either of the types shown in.Figs.-1 or 5.or maybe of any otherforirnsuitjable.to the work at hand. The form IirrFigrl isparticularlygadapted to solder-- rvring. irons comprises a solderingiron tip T of a .f :suitable metaLas coppexysecuredto the stem S by a,sleeve'.3 .towhich both-the stem and the tip are @threaded respectivelyat 34 and 35. cThe rear end bore 36 coaxiallywith thatoffthe .stexniSwhen connectedthereto -and a d plurality of crossdrillingsare 4providedat the forward end of y this bore v(aslshown in Fig. 3 two i.inbnumber). Thesecross drillings connect with .the bore` 36 Aanddischarge into an annular dis- Y tribiiting chamber 38 Aformed betweenthe solderingvtipglandthesleeve 33 by providing an annular recessin thelatter. vllnannular discharge .passage 3l-liefAconstricted'cross"sectional area compared with chamber A38 is providedbetweenthe soldering tip T and an internal rib 40 formed on the sleeve33.` Gas passing throughA this passage discharges intov a chamber 4Ialso formed between the soldering Vtip T and the sleeve 33 where itisburned in confinement; the walls of the sleeve 33. preventingdissipation of the heat in the air and causing it to be absorbed by thesoldering tip. The sleeve is provided at the rear end of chamber 4I witha plurality of apertures 42, equidistantly spaced apart and throughwhich air is admitted to complete combustion of the gas but, aside fromthese aperturesfthe wall of the sleeve is imperforate. Preferably thelength of chamber 4I is such as to accommodate the whole of the ane andthe forward end of the 'chamber wall is spun downtoward the solderingtip leaving only a small-,annular gap for escape of the products ofcombustion. With this arrangement of parts, no appreciable part of theflame is exposed to the heat dissipating influence of the atmospherebut, at the same timesthe flame is visible through the apertures 424from any direction. The tip T' shown in Fig. 5 may be usedinterchangeably with the Vtip T shown in Fig. 1 and obviously thedetachableinjector and throat member may be replaced by others havingdifferent characteristics from those shown 'and described adapting thetorch to varying conditions of work and to the requirements oftheparticular tips .used therewith.

While only two interchangeable members are shown in the drawing, it isto be clearly understood that the number and character thereof providedwill depend upon the variations in jobs to be performed and theinvention is not to be considered as limited in any sense to these twoforms.

I claim:

1. In a torch, a handle having a bore therein and a socket at one end ofsaid bore, a gas conduit in said bore, a tubular connection block insaid socket and secured to said conduit whereby said block is held inposition, said block being provided with a skirt at the end remote fromsaid conduit, a mixer comprising an integral tubular body having portstherein, the bore of said mixer flaring outwardly in both directionsfrom said ports, an injector in said bore on one side of said ports anda throat member in said bore on the other side of said ports, means forholding said mixer in said block in such a position that the ports areprotected by the skirt, and a burner carried by said mixer.

2. In a torch,` a handle having a gas passage therethrough and a socketin its forward end; a tubular connection block secured in the socket; a

stem; and a unitary mixer having its rear end fastened in said tubularblock and having its forward end fastened to the rear end of said stem;said mixer comprising an integral tubular body having air inletsradially arranged therein, an

i injector in the bore of said tubular body behind the air inletstherein, and a throat member in the bore of said tubular body ahead ofthe air inlets; said block having a skirt formed on the forward endthereof for surrounding and overlying the air inlets in said tubularbody.

3. An assembly for use with a torch comprising, in combination, a blockadapted to be secured within the handle of said torch; a gas mixerhaving one end thereof removably secured in said block, said mixerhaving an axial passage therethrough and a series of radial passagesleading from the atmosphere to said axial passage; injector and throatmembers in said axial passage and being separately insertable andremovable from opposite ends of said axial passage; and a skirt portionintegral with 'said block for surrounding and overlying said radialpassages in said mixer.

LLOYD W. YOUNG.

